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<div class="header">
  <div class="headertitle"><div class="title">tsi2c.cpp</div></div>
</div><!--header-->
<div class="contents">
<div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno">    1</span><span class="comment">/*</span></div>
<div class="line"><a id="l00002" name="l00002"></a><span class="lineno">    2</span><span class="comment">  Created by Fabrizio Di Vittorio (fdivitto2013@gmail.com) - &lt;http://www.fabgl.com&gt;</span></div>
<div class="line"><a id="l00003" name="l00003"></a><span class="lineno">    3</span><span class="comment">  Copyright (c) 2019-2022 Fabrizio Di Vittorio.</span></div>
<div class="line"><a id="l00004" name="l00004"></a><span class="lineno">    4</span><span class="comment">  All rights reserved.</span></div>
<div class="line"><a id="l00005" name="l00005"></a><span class="lineno">    5</span><span class="comment"></span> </div>
<div class="line"><a id="l00006" name="l00006"></a><span class="lineno">    6</span><span class="comment"></span> </div>
<div class="line"><a id="l00007" name="l00007"></a><span class="lineno">    7</span><span class="comment">* Please contact fdivitto2013@gmail.com if you need a commercial license.</span></div>
<div class="line"><a id="l00008" name="l00008"></a><span class="lineno">    8</span><span class="comment"></span> </div>
<div class="line"><a id="l00009" name="l00009"></a><span class="lineno">    9</span><span class="comment"></span> </div>
<div class="line"><a id="l00010" name="l00010"></a><span class="lineno">   10</span><span class="comment">* This library and related software is available under GPL v3.</span></div>
<div class="line"><a id="l00011" name="l00011"></a><span class="lineno">   11</span><span class="comment"></span> </div>
<div class="line"><a id="l00012" name="l00012"></a><span class="lineno">   12</span><span class="comment">  FabGL is free software: you can redistribute it and/or modify</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno">   13</span><span class="comment">  it under the terms of the GNU General Public License as published by</span></div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno">   14</span><span class="comment">  the Free Software Foundation, either version 3 of the License, or</span></div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno">   15</span><span class="comment">  (at your option) any later version.</span></div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno">   16</span><span class="comment"></span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno">   17</span><span class="comment">  FabGL is distributed in the hope that it will be useful,</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno">   18</span><span class="comment">  but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno">   19</span><span class="comment">  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno">   20</span><span class="comment">  GNU General Public License for more details.</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno">   21</span><span class="comment"></span> </div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno">   22</span><span class="comment">  You should have received a copy of the GNU General Public License</span></div>
<div class="line"><a id="l00023" name="l00023"></a><span class="lineno">   23</span><span class="comment">  along with FabGL.  If not, see &lt;http://www.gnu.org/licenses/&gt;.</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno">   24</span><span class="comment"> */</span></div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno">   25</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno">   26</span> </div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno">   27</span><span class="preprocessor">#ifdef ARDUINO</span></div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno">   28</span> </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno">   29</span> </div>
<div class="line"><a id="l00030" name="l00030"></a><span class="lineno">   30</span><span class="preprocessor">#include &quot;freertos/FreeRTOS.h&quot;</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno">   31</span><span class="preprocessor">#include &quot;freertos/task.h&quot;</span></div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno">   32</span> </div>
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno">   33</span><span class="preprocessor">#include &quot;<a class="code" href="tsi2c_8h.html">tsi2c.h</a>&quot;</span></div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno">   34</span> </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno">   35</span> </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno">   36</span><span class="preprocessor">#pragma GCC optimize (&quot;O2&quot;</span>)</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno">   37</span> </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno">   38</span> </div>
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno">   39</span><span class="keyword">namespace </span>fabgl {</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno">   40</span> </div>
<div class="line"><a id="l00041" name="l00041"></a><span class="lineno">   41</span> </div>
<div class="line"><a id="l00042" name="l00042"></a><span class="lineno">   42</span><span class="preprocessor">#define I2C_COMMTASK_STACK    1000</span></div>
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno">   43</span><span class="preprocessor">#define I2C_COMMTASK_PRIORITY 5</span></div>
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno">   44</span><span class="preprocessor">#define I2C_DEFAULT_FREQUENCY 100000</span></div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno">   45</span> </div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno">   46</span> </div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno">   47</span><span class="preprocessor">#define EVTGROUP_READY (1 &lt;&lt; 0)</span></div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno">   48</span><span class="preprocessor">#define EVTGROUP_WRITE (1 &lt;&lt; 1)</span></div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno">   49</span><span class="preprocessor">#define EVTGROUP_READ  (1 &lt;&lt; 2)</span></div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno">   50</span><span class="preprocessor">#define EVTGROUP_DONE  (1 &lt;&lt; 3)</span></div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno">   51</span> </div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno">   52</span> </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"><a class="line" href="classfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2.html#a93f66e29e22bca7a9f5d8e3d5af2d6a2">   53</a></span><a class="code hl_function" href="classfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2.html#a93f66e29e22bca7a9f5d8e3d5af2d6a2">I2C::I2C</a>(<span class="keywordtype">int</span> bus)</div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno">   54</span>  :</div>
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno">   55</span>    #ifdef FABGL_OLDI2C</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno">   56</span>    m_i2c(nullptr),</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno">   57</span>    #endif</div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno">   58</span>    m_i2cAvailable(false),</div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno">   59</span>    m_bus(bus),</div>
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno">   60</span>    m_commTaskHandle(nullptr),</div>
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno">   61</span>    m_eventGroup(nullptr)</div>
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno">   62</span>{</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno">   63</span>}</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno">   64</span> </div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno">   65</span> </div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno">   66</span>I2C::~I2C()</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno">   67</span>{</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno">   68</span>  end();</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno">   69</span>}</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno">   70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno">   71</span> </div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"><a class="line" href="classfabgl_1_1_i2_c_abdd72a91fee181ca1b9eb05120e60a28.html#abdd72a91fee181ca1b9eb05120e60a28">   72</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classfabgl_1_1_i2_c_abdd72a91fee181ca1b9eb05120e60a28.html#abdd72a91fee181ca1b9eb05120e60a28">I2C::begin</a>(gpio_num_t SDAGPIO, gpio_num_t SCLGPIO)</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno">   73</span>{</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno">   74</span>  m_SDAGPIO   = SDAGPIO;</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno">   75</span>  m_SCLGPIO   = SCLGPIO;</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno">   76</span> </div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno">   77</span>  m_eventGroup = xEventGroupCreate();</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno">   78</span> </div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno">   79</span>  <span class="comment">// why a task? Because esp32 i2c communications must be done on the same core</span></div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno">   80</span>  <span class="comment">// must be pinned to one core (0 in this case)</span></div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno">   81</span>  xTaskCreatePinnedToCore(&amp;commTaskFunc, <span class="stringliteral">&quot;&quot;</span>, I2C_COMMTASK_STACK, <span class="keyword">this</span>, I2C_COMMTASK_PRIORITY, &amp;m_commTaskHandle, 0);</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno">   82</span> </div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno">   83</span>  <span class="comment">// wait for commTaskFunc() ends initialization</span></div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno">   84</span>  xEventGroupWaitBits(m_eventGroup, EVTGROUP_DONE, <span class="keyword">true</span>, <span class="keyword">false</span>, portMAX_DELAY);</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno">   85</span> </div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno">   86</span>  <span class="comment">// ready to accept jobs</span></div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno">   87</span>  xEventGroupSetBits(m_eventGroup, EVTGROUP_READY);</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno">   88</span> </div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno">   89</span>  <span class="keywordflow">return</span> m_i2cAvailable;</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno">   90</span>}</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno">   91</span> </div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno">   92</span> </div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno">   93</span><span class="keywordtype">void</span> I2C::end()</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno">   94</span>{</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno">   95</span>  <span class="keywordflow">if</span> (m_commTaskHandle)</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno">   96</span>    vTaskDelete(m_commTaskHandle);</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno">   97</span>  m_commTaskHandle = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno">   98</span> </div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno">   99</span><span class="preprocessor">  #ifdef FABGL_OLDI2C</span></div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno">  100</span>  <span class="keywordflow">if</span> (m_i2c)</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno">  101</span>    i2cRelease(m_i2c);</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno">  102</span>  m_i2c = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno">  103</span><span class="preprocessor">  #endif</span></div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno">  104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno">  105</span>  <span class="keywordflow">if</span> (m_eventGroup)</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno">  106</span>    vEventGroupDelete(m_eventGroup);</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno">  107</span>  m_eventGroup = <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno">  108</span>  </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno">  109</span>  m_i2cAvailable = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno">  110</span>}</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno">  111</span> </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno">  112</span> </div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"><a class="line" href="classfabgl_1_1_i2_c_a5683609bed861f2c075c25d935029e3f.html#a5683609bed861f2c075c25d935029e3f">  113</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="classfabgl_1_1_i2_c_a5683609bed861f2c075c25d935029e3f.html#a5683609bed861f2c075c25d935029e3f">I2C::write</a>(<span class="keywordtype">int</span> address, uint8_t * buffer, <span class="keywordtype">int</span> size, <span class="keywordtype">int</span> frequency, <span class="keywordtype">int</span> timeOutMS)</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno">  114</span>{</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno">  115</span>  <span class="comment">// wait for I2C to be ready</span></div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno">  116</span>  xEventGroupWaitBits(m_eventGroup, EVTGROUP_READY, <span class="keyword">true</span>, <span class="keyword">false</span>, portMAX_DELAY);</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno">  117</span> </div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno">  118</span>  m_jobInfo.frequency = frequency;</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno">  119</span>  m_jobInfo.address   = address;</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno">  120</span>  m_jobInfo.buffer    = buffer;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno">  121</span>  m_jobInfo.size      = size;</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno">  122</span>  m_jobInfo.timeout   = timeOutMS;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno">  123</span> </div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno">  124</span>  <span class="comment">// unlock comm task for writing</span></div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno">  125</span>  <span class="comment">// wait for comm task to finish job</span></div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno">  126</span>  xEventGroupSync(m_eventGroup, EVTGROUP_WRITE, EVTGROUP_DONE, portMAX_DELAY);</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno">  127</span> </div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno">  128</span><span class="preprocessor">  #ifdef FABGL_OLDI2C</span></div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno">  129</span>  <span class="keywordtype">bool</span> ret = (m_jobInfo.lastError == I2C_ERROR_OK);</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno">  130</span><span class="preprocessor">  #else</span></div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno">  131</span>  <span class="keywordtype">bool</span> ret = (m_jobInfo.lastError == ESP_OK);</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno">  132</span><span class="preprocessor">  #endif</span></div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno">  133</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno">  134</span>  <span class="comment">// makes I2C ready for new requests</span></div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno">  135</span>  xEventGroupSetBits(m_eventGroup, EVTGROUP_READY);</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno">  136</span> </div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno">  137</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno">  138</span>}</div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno">  139</span> </div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno">  140</span> </div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"><a class="line" href="classfabgl_1_1_i2_c_aee6d332047f3429253a95c94c59cccd9.html#aee6d332047f3429253a95c94c59cccd9">  141</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="classfabgl_1_1_i2_c_aee6d332047f3429253a95c94c59cccd9.html#aee6d332047f3429253a95c94c59cccd9">I2C::read</a>(<span class="keywordtype">int</span> address, uint8_t * buffer, <span class="keywordtype">int</span> size, <span class="keywordtype">int</span> frequency, <span class="keywordtype">int</span> timeOutMS)</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno">  142</span>{</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno">  143</span>  <span class="comment">// wait for I2C to be ready</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno">  144</span>  xEventGroupWaitBits(m_eventGroup, EVTGROUP_READY, <span class="keyword">true</span>, <span class="keyword">false</span>, portMAX_DELAY);</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno">  145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno">  146</span>  m_jobInfo.frequency = frequency;</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno">  147</span>  m_jobInfo.address   = address;</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno">  148</span>  m_jobInfo.buffer    = buffer;</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno">  149</span>  m_jobInfo.size      = size;</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno">  150</span>  m_jobInfo.timeout   = timeOutMS;</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno">  151</span> </div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno">  152</span>  <span class="comment">// unlock comm task for reading</span></div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno">  153</span>  <span class="comment">// wait for comm task to finish job</span></div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno">  154</span>  xEventGroupSync(m_eventGroup, EVTGROUP_READ, EVTGROUP_DONE, portMAX_DELAY);</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno">  155</span> </div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno">  156</span>  <span class="keywordtype">int</span> ret = m_jobInfo.readCount;</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno">  157</span> </div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno">  158</span>  <span class="comment">// makes I2C ready for new requests</span></div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno">  159</span>  xEventGroupSetBits(m_eventGroup, EVTGROUP_READY);</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno">  160</span> </div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno">  161</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno">  162</span>}</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno">  163</span> </div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno">  164</span> </div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno">  165</span><span class="preprocessor">#ifndef FABGL_OLDI2C</span></div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno">  166</span><span class="keyword">static</span> <span class="keywordtype">int</span> i2cGetFrequency(uint8_t i2c_num)</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno">  167</span>{</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno">  168</span>  uint32_t r;</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno">  169</span>  i2cGetClock(i2c_num, &amp;r);</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno">  170</span>  <span class="keywordflow">return</span> r;</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno">  171</span>}</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno">  172</span><span class="keyword">static</span> <span class="keywordtype">void</span> i2cSetFrequency(uint8_t i2c_num, <span class="keywordtype">int</span> freq)</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno">  173</span>{</div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno">  174</span>  i2cSetClock(i2c_num, freq);</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno">  175</span>}</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno">  176</span><span class="preprocessor">#endif</span></div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno">  177</span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno">  178</span> </div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno">  179</span><span class="keywordtype">void</span> I2C::commTaskFunc(<span class="keywordtype">void</span> * pvParameters)</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno">  180</span>{</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno">  181</span>  <a class="code hl_function" href="classfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2.html#a93f66e29e22bca7a9f5d8e3d5af2d6a2">I2C</a> * ths = (<a class="code hl_function" href="classfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2.html#a93f66e29e22bca7a9f5d8e3d5af2d6a2">I2C</a>*) pvParameters;</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno">  182</span> </div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno">  183</span>  <span class="keyword">auto</span> initRes = i2cInit(ths-&gt;m_bus, ths-&gt;m_SDAGPIO, ths-&gt;m_SCLGPIO, I2C_DEFAULT_FREQUENCY);</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno">  184</span>  </div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno">  185</span><span class="preprocessor">  #ifdef FABGL_OLDI2C</span></div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno">  186</span>  <span class="keywordflow">if</span> (!initRes) {</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno">  187</span>    ESP_LOGE(<span class="stringliteral">&quot;FabGL&quot;</span>, <span class="stringliteral">&quot;unable to init I2C&quot;</span>);</div>
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno">  188</span>    abort();</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno">  189</span>  }</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno">  190</span>  <span class="keyword">auto</span> i2c = initRes;</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno">  191</span>  i2cFlush(i2c);</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno">  192</span>  ths-&gt;m_i2c = i2c;</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno">  193</span><span class="preprocessor">  #else</span></div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno">  194</span>  <span class="keywordflow">if</span> (initRes != ESP_OK) {</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno">  195</span>    ESP_LOGE(<span class="stringliteral">&quot;FabGL&quot;</span>, <span class="stringliteral">&quot;unable to init I2C&quot;</span>);</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno">  196</span>    abort();</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno">  197</span>  }</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno">  198</span>  <span class="keyword">auto</span> i2c = ths-&gt;m_bus;</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno">  199</span><span class="preprocessor">  #endif</span></div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno">  200</span>  </div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno">  201</span>  ths-&gt;m_i2cAvailable = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno">  202</span> </div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno">  203</span>  <span class="comment">// get initial default frequency</span></div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno">  204</span>  <span class="keywordtype">int</span> freq = i2cGetFrequency(i2c);</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno">  205</span> </div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno">  206</span>  I2CJobInfo * job = &amp;ths-&gt;m_jobInfo;</div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno">  207</span> </div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno">  208</span>  <span class="comment">// main send/receive loop</span></div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno">  209</span>  <span class="keywordflow">while</span> (<span class="keyword">true</span>) {</div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno">  210</span> </div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno">  211</span>    <span class="comment">// unlock waiting task</span></div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno">  212</span>    xEventGroupSetBits(ths-&gt;m_eventGroup, EVTGROUP_DONE);</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno">  213</span> </div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno">  214</span>    <span class="comment">// wait for another job</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno">  215</span>    <span class="keyword">auto</span> bits = xEventGroupWaitBits(ths-&gt;m_eventGroup, EVTGROUP_WRITE | EVTGROUP_READ, <span class="keyword">true</span>, <span class="keyword">false</span>, portMAX_DELAY);</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno">  216</span> </div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno">  217</span>    <span class="comment">// setup frequency if necessary</span></div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno">  218</span>    <span class="keywordflow">if</span> (freq != job-&gt;frequency) {</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno">  219</span>      freq = job-&gt;frequency;</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno">  220</span>      i2cSetFrequency(i2c, freq);</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno">  221</span>    }</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno">  222</span> </div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno">  223</span><span class="preprocessor">    #ifdef FABGL_OLDI2C</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno">  224</span>    <span class="keywordflow">if</span> (bits &amp; EVTGROUP_WRITE)</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno">  225</span>      job-&gt;lastError = i2cWrite(i2c, job-&gt;address, job-&gt;buffer, job-&gt;size, <span class="keyword">true</span>, job-&gt;timeout);</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno">  226</span>    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (bits &amp; EVTGROUP_READ)</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno">  227</span>      job-&gt;lastError = i2cRead(i2c, job-&gt;address, job-&gt;buffer, job-&gt;size, <span class="keyword">true</span>, job-&gt;timeout, &amp;job-&gt;readCount);</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno">  228</span><span class="preprocessor">    #else</span></div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno">  229</span>    <span class="keywordflow">if</span> (bits &amp; EVTGROUP_WRITE)</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno">  230</span>      job-&gt;lastError = i2cWrite(i2c, job-&gt;address, job-&gt;buffer, job-&gt;size, job-&gt;timeout);</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno">  231</span>    <span class="keywordflow">else</span> <span class="keywordflow">if</span> (bits &amp; EVTGROUP_READ)</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno">  232</span>      job-&gt;lastError = i2cRead(i2c, job-&gt;address, job-&gt;buffer, job-&gt;size, job-&gt;timeout, &amp;job-&gt;readCount);</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno">  233</span><span class="preprocessor">    #endif</span></div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno">  234</span> </div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno">  235</span>  }</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno">  236</span> </div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno">  237</span>}</div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno">  238</span> </div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno">  239</span> </div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno">  240</span> </div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno">  241</span>} <span class="comment">// end of namespace</span></div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno">  242</span> </div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno">  243</span> </div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno">  244</span><span class="preprocessor">#endif  </span><span class="comment">// #ifdef ARDUINO</span></div>
<div class="ttc" id="aclassfabgl_1_1_i2_c_a5683609bed861f2c075c25d935029e3f_html_a5683609bed861f2c075c25d935029e3f"><div class="ttname"><a href="classfabgl_1_1_i2_c_a5683609bed861f2c075c25d935029e3f.html#a5683609bed861f2c075c25d935029e3f">fabgl::I2C::write</a></div><div class="ttdeci">bool write(int address, uint8_t *buffer, int size, int frequency=100000, int timeOutMS=50)</div><div class="ttdoc">Sends a buffer to I2C bus.</div><div class="ttdef"><b>Definition:</b> <a href="tsi2c_8cpp_source.html#l00113">tsi2c.cpp:113</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2_html_a93f66e29e22bca7a9f5d8e3d5af2d6a2"><div class="ttname"><a href="classfabgl_1_1_i2_c_a93f66e29e22bca7a9f5d8e3d5af2d6a2.html#a93f66e29e22bca7a9f5d8e3d5af2d6a2">fabgl::I2C::I2C</a></div><div class="ttdeci">I2C(int bus=0)</div><div class="ttdoc">I2C class constructor.</div><div class="ttdef"><b>Definition:</b> <a href="tsi2c_8cpp_source.html#l00053">tsi2c.cpp:53</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_i2_c_abdd72a91fee181ca1b9eb05120e60a28_html_abdd72a91fee181ca1b9eb05120e60a28"><div class="ttname"><a href="classfabgl_1_1_i2_c_abdd72a91fee181ca1b9eb05120e60a28.html#abdd72a91fee181ca1b9eb05120e60a28">fabgl::I2C::begin</a></div><div class="ttdeci">bool begin(gpio_num_t SDAGPIO, gpio_num_t SCLGPIO)</div><div class="ttdoc">Initializes I2C instance associating GPIOs to I2C signals.</div><div class="ttdef"><b>Definition:</b> <a href="tsi2c_8cpp_source.html#l00072">tsi2c.cpp:72</a></div></div>
<div class="ttc" id="aclassfabgl_1_1_i2_c_aee6d332047f3429253a95c94c59cccd9_html_aee6d332047f3429253a95c94c59cccd9"><div class="ttname"><a href="classfabgl_1_1_i2_c_aee6d332047f3429253a95c94c59cccd9.html#aee6d332047f3429253a95c94c59cccd9">fabgl::I2C::read</a></div><div class="ttdeci">int read(int address, uint8_t *buffer, int size, int frequency=100000, int timeOutMS=50)</div><div class="ttdoc">Receives a buffer from I2C bus.</div><div class="ttdef"><b>Definition:</b> <a href="tsi2c_8cpp_source.html#l00141">tsi2c.cpp:141</a></div></div>
<div class="ttc" id="atsi2c_8h_html"><div class="ttname"><a href="tsi2c_8h.html">tsi2c.h</a></div><div class="ttdoc">This file contains fabgl::I2C definition.</div></div>
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